Mack had 101 yards and three touchdowns -- all in the second half -- on 18 carries while Matt Asiata ran for 116 yards on 19 carries. Brian Johnson completed 16-of-23 passes for 243 yards, with a TD and David Reed caught two passes for 73 yards and a touchdown for Utah (4-0, 2-0).

Shea Smith was 7-for-13 passing for 138 yards and a touchdown while also throwing two interceptions for Air Force (3-1, 1-1). Savier Stephens gained 33 yards rushing with a touchdown. Kevin Fogler had four receptions for 93 yards.

Air Force tied the score with 5:06 to go, but the Utes drove 80 yards for the winning score.